Add periodic, neighborhood options; fix #22, fix #23, fix #24

app/creature.js

@@ -123,6 +123,7 @@ var factory = (function () {
     } else return this.energy !== this.maxEnergy;
   };
 
+  baseCA.prototype.actionRadius = 1;
   baseCA.prototype.boundEnergy = function () {};
   baseCA.prototype.isDead = function () { return false; };
   baseCA.prototype.process = function (neighbors, x, y) {};
@@ -154,7 +155,7 @@ var factory = (function () {
           };
         }
 
-        var color = options.color;
+        var color = options.color || options.colour;
         // set the color randomly if none is provided
         if (typeof color !== 'object' || color.length !== 3) {
           options.color = [_.random(255), _.random(255), _.random(255)];
@@ -185,12 +186,14 @@ var factory = (function () {
            function () { init.call(this); } :
            function () {};
 
-        var color = options.color;
+        var color = options.color = options.color || options.colour;
         // set the color randomly if none is provided
         if (typeof color !== 'object' || color.length !== 3) {
           options.color = [_.random(255), _.random(255), _.random(255)];
         }
 
+        options.colorFn = options.colorFn || options.colourFn;
+
         types[type].prototype = new baseCA();
         types[type].prototype.constructor = types[type];
 

app/terrarium.js

@@ -17,8 +17,12 @@ var dom = require('./dom.js');
  *   @param {array} background      an RGB triplet for the canvas' background
  */
 function Terrarium (width, height, options) {
+  var cellSize, neighborhood;
   options = options || {};
-  var cellSize = options.cellSize || 10;
+  cellSize = options.cellSize || 10;
+  neighborhood = options.neighborhood || options.neighbourhood;
+  if (typeof neighborhood === 'string') neighborhood = neighborhood.toLowerCase();
+
   this.width = width;
   this.height = height;
   this.cellSize = cellSize;
@@ -28,6 +32,7 @@ function Terrarium(width, height, options) {
   this.grid = [];
   this.nextFrame = false;
   this.hasChanged = false;
+  this.getNeighborCoords = _.getNeighborCoordsFn(width, height, neighborhood === 'vonneumann', options.periodic);
 }
 
 /**
@@ -110,7 +115,7 @@ Terrarium.prototype.step = function (steps) {
   function processCreaturesInner (creature, x, y) {
     if (creature) {
       var neighbors = _.map(
-        _.getNeighborCoords(x, y, gridWidth - 1, gridHeight - 1, creature.actionRadius),
+        self.getNeighborCoords(x, y, creature.actionRadius),
         zipCoordsWithNeighbors
       );
       var result = creature.process(neighbors, x, y);

app/util.js

@@ -9,27 +9,106 @@ var _ = require('../lodash_custom/lodash.custom.min.js')._;
  * Takes a cell and returns the coordinates of its neighbors
  * @param  {int} x0     - x position of cell
  * @param  {int} y0     - y position of cell
- * @param  {int} xMax   - maximum x index i.e. grid width - 1
- * @param  {int} yMax   - maximum x index i.e. grid height - 1
+ * @param  {int} xMax   - maximum x index i.e. grid width
+ * @param  {int} yMax   - maximum x index i.e. grid height
  * @param  {int} radius - (default = 1) neighbor radius
  * @return {array}      - an array of [x, y] pairs of the neighboring cells
  */
-_.getNeighborCoords = function (x0, y0, xMax, yMax, radius) {
-  var coords = [], current, xLo, xHi, yLo, yHi;
-  if (typeof radius !== 'number' || radius < 1) radius = 1;
+_.getNeighborCoordsFn = function (xMax, yMax, vonNeumann, periodic) {
+  if (periodic) {
+    if (vonNeumann) {
+      // periodic von neumann
+      return function (x0, y0, radius) {
+        var coords = [], x, rX, y, rY, rYMax;
+
+        for (rX = -radius; rX <= radius; ++rX) {
+          rYMax = radius - Math.abs(rX);
+          for (rY = -rYMax; rY <= rYMax; ++rY) {
+            x = ((rX + x0) % xMax + xMax) % xMax;
+            y = ((rY + y0) % yMax + yMax) % yMax;
+            if (x !== x0 || y !== y0) {
+              coords.push({
+                x: x,
+                y: y
+              });
+            }
+          }
+        }
+
+        return coords;
+      };
+    }
+    else {
+      // periodic moore
+      return function (x0, y0, radius) {
+        var coords = [], x, xLo, xHi, y, yLo, yHi;
+
+        xLo = x0 - radius;
+        yLo = y0 - radius;
+        xHi = x0 + radius;
+        yHi = y0 + radius;
+
+        for (x = xLo; x <= xHi; ++x) {
+          for (y = yLo; y <= yHi; ++y) {
+            if (x !== x0 || y !== y0) {
+              coords.push({
+                x: (x % xMax + xMax) % xMax,
+                y: (y % yMax + yMax) % yMax
+              });
+            }
+          }
+        }
+
+        return coords;
+      };
+    }
+  } else {
+    // non-periodic, need to restrict to within [0, max)
+    xMax -= 1;
+    yMax -= 1;
+
+    if (vonNeumann) {
+      //non-periodic von-neumann
+      return function (x0, y0, radius) {
+        var coords = [], x, rX, y, rY, rYMax;
+
+        for (rX = -radius; rX <= radius; ++rX) {
+          rYMax = radius - Math.abs(rX);
+          for (rY = -rYMax; rY <= rYMax; ++rY) {
+            x = rX + x0;
+            y = rY + y0;
+            if (x >= 0 && y >=0 && x <= xMax && y <= yMax && (x !== x0 || y !== y0)) {
+              coords.push({
+                x: x,
+                y: y
+              });
+            }
+          }
+        }
+
+        return coords;
+      };
+    }
+    else {
+      // non-periodic moore
+      return function (x0, y0, radius) {
+        var coords = [], x, xLo, xHi, y, yLo, yHi;
 
         xLo = Math.max(0, x0 - radius);
         yLo = Math.max(0, y0 - radius);
         xHi = Math.min(x0 + radius, xMax);
         yHi = Math.min(y0 + radius, yMax);
 
-  for (var x = xLo; x <= xHi; x++)
-    for (var y = yLo; y <= yHi; y++)
+        for (x = xLo; x <= xHi; ++x)
+          for (y = yLo; y <= yHi; ++y)
             if (x !== x0 || y !== y0)
               coords.push({ x: x, y: y });
 
         return coords;
       };
+    }
+  }
+};
 
 _.pickRandomWeighted = function (weightedArrays) {
   var sum = 0, rand = _.random(100, true);

dist/terra.js

@@ -134,6 +134,7 @@ var factory = (function () {
     } else return this.energy !== this.maxEnergy;
   };
 
+  baseCA.prototype.actionRadius = 1;
   baseCA.prototype.boundEnergy = function () {};
   baseCA.prototype.isDead = function () { return false; };
   baseCA.prototype.process = function (neighbors, x, y) {};
@@ -165,7 +166,7 @@ var factory = (function () {
           };
         }
 
-        var color = options.color;
+        var color = options.color || options.colour;
         // set the color randomly if none is provided
         if (typeof color !== 'object' || color.length !== 3) {
           options.color = [_.random(255), _.random(255), _.random(255)];
@@ -196,12 +197,14 @@ var factory = (function () {
            function () { init.call(this); } :
            function () {};
 
-        var color = options.color;
+        var color = options.color = options.color || options.colour;
         // set the color randomly if none is provided
         if (typeof color !== 'object' || color.length !== 3) {
           options.color = [_.random(255), _.random(255), _.random(255)];
         }
 
+        options.colorFn = options.colorFn || options.colourFn;
+
         types[type].prototype = new baseCA();
         types[type].prototype.constructor = types[type];
 
@@ -318,8 +321,12 @@ var dom = require('./dom.js');
  *   @param {array} background      an RGB triplet for the canvas' background
  */
 function Terrarium (width, height, options) {
+  var cellSize, neighborhood;
   options = options || {};
-  var cellSize = options.cellSize || 10;
+  cellSize = options.cellSize || 10;
+  neighborhood = options.neighborhood || options.neighbourhood;
+  if (typeof neighborhood === 'string') neighborhood = neighborhood.toLowerCase();
+
   this.width = width;
   this.height = height;
   this.cellSize = cellSize;
@@ -329,6 +336,7 @@ function Terrarium(width, height, options) {
   this.grid = [];
   this.nextFrame = false;
   this.hasChanged = false;
+  this.getNeighborCoords = _.getNeighborCoordsFn(width, height, neighborhood === 'vonneumann', options.periodic);
 }
 
 /**
@@ -411,7 +419,7 @@ Terrarium.prototype.step = function (steps) {
   function processCreaturesInner (creature, x, y) {
     if (creature) {
       var neighbors = _.map(
-        _.getNeighborCoords(x, y, gridWidth - 1, gridHeight - 1, creature.actionRadius),
+        self.getNeighborCoords(x, y, creature.actionRadius),
         zipCoordsWithNeighbors
       );
       var result = creature.process(neighbors, x, y);
@@ -553,27 +561,106 @@ var _ = require('../lodash_custom/lodash.custom.min.js')._;
  * Takes a cell and returns the coordinates of its neighbors
  * @param  {int} x0     - x position of cell
  * @param  {int} y0     - y position of cell
- * @param  {int} xMax   - maximum x index i.e. grid width - 1
- * @param  {int} yMax   - maximum x index i.e. grid height - 1
+ * @param  {int} xMax   - maximum x index i.e. grid width
+ * @param  {int} yMax   - maximum x index i.e. grid height
  * @param  {int} radius - (default = 1) neighbor radius
  * @return {array}      - an array of [x, y] pairs of the neighboring cells
  */
-_.getNeighborCoords = function (x0, y0, xMax, yMax, radius) {
-  var coords = [], current, xLo, xHi, yLo, yHi;
-  if (typeof radius !== 'number' || radius < 1) radius = 1;
+_.getNeighborCoordsFn = function (xMax, yMax, vonNeumann, periodic) {
+  if (periodic) {
+    if (vonNeumann) {
+      // periodic von neumann
+      return function (x0, y0, radius) {
+        var coords = [], x, rX, y, rY, rYMax;
+
+        for (rX = -radius; rX <= radius; ++rX) {
+          rYMax = radius - Math.abs(rX);
+          for (rY = -rYMax; rY <= rYMax; ++rY) {
+            x = ((rX + x0) % xMax + xMax) % xMax;
+            y = ((rY + y0) % yMax + yMax) % yMax;
+            if (x !== x0 || y !== y0) {
+              coords.push({
+                x: x,
+                y: y
+              });
+            }
+          }
+        }
+
+        return coords;
+      };
+    }
+    else {
+      // periodic moore
+      return function (x0, y0, radius) {
+        var coords = [], x, xLo, xHi, y, yLo, yHi;
+
+        xLo = x0 - radius;
+        yLo = y0 - radius;
+        xHi = x0 + radius;
+        yHi = y0 + radius;
+
+        for (x = xLo; x <= xHi; ++x) {
+          for (y = yLo; y <= yHi; ++y) {
+            if (x !== x0 || y !== y0) {
+              coords.push({
+                x: (x % xMax + xMax) % xMax,
+                y: (y % yMax + yMax) % yMax
+              });
+            }
+          }
+        }
+
+        return coords;
+      };
+    }
+  } else {
+    // non-periodic, need to restrict to within [0, max)
+    xMax -= 1;
+    yMax -= 1;
+
+    if (vonNeumann) {
+      //non-periodic von-neumann
+      return function (x0, y0, radius) {
+        var coords = [], x, rX, y, rY, rYMax;
+
+        for (rX = -radius; rX <= radius; ++rX) {
+          rYMax = radius - Math.abs(rX);
+          for (rY = -rYMax; rY <= rYMax; ++rY) {
+            x = rX + x0;
+            y = rY + y0;
+            if (x >= 0 && y >=0 && x <= xMax && y <= yMax && (x !== x0 || y !== y0)) {
+              coords.push({
+                x: x,
+                y: y
+              });
+            }
+          }
+        }
+
+        return coords;
+      };
+    }
+    else {
+      // non-periodic moore
+      return function (x0, y0, radius) {
+        var coords = [], x, xLo, xHi, y, yLo, yHi;
 
         xLo = Math.max(0, x0 - radius);
         yLo = Math.max(0, y0 - radius);
         xHi = Math.min(x0 + radius, xMax);
         yHi = Math.min(y0 + radius, yMax);
 
-  for (var x = xLo; x <= xHi; x++)
-    for (var y = yLo; y <= yHi; y++)
+        for (x = xLo; x <= xHi; ++x)
+          for (y = yLo; y <= yHi; ++y)
             if (x !== x0 || y !== y0)
               coords.push({ x: x, y: y });
 
         return coords;
       };
+    }
+  }
+};
 
 _.pickRandomWeighted = function (weightedArrays) {
   var sum = 0, rand = _.random(100, true);